Ocean Science
Ocean Science
OS
Articles | Volume 22, issue 5
Articles | Volume 22, issue 5
https://doi.org/10.5194/os-22-2939-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/os-22-2939-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 22, issue 5
Technical note
 | 
28 Sep 2026
Technical note |  | 28 Sep 2026

Intercomparison of three SWOT-derived Level-4 products: from mapping accuracy to multi-scale dynamical representation

Qifan Wu, Chaojie Zhou, Bijin Liu, Wei Wu, Jianlong Li, and Jungang Yang

Data sets

Global Ocean gridded L4 sea surface heights and derived variables nrt E.U. Copernicus Marine Service Information https://doi.org/10.48670/moi-00041

Global Ocean Gridded L 4 Sea Surface Heights And Derived Variables Reprocessed 1993 Ongoing E.U. Copernicus Marine Service Information https://doi.org/10.48670/moi-00148

Global Ocean gridded L4 sea surface heights and derived variables nrt E.U. Copernicus Marine Service Information https://doi.org/10.48670/moi-00149

SSALTO/DUACS Experimental Product Handbook Gridded Sea Level Heights and geostrophic velocities computed with SWOT Level-3 products (using both KaRIn and nadir instruments) (v1.0) AVISO/DUACS https://doi.org/10.24400/527896/A01-2024.007

SWOT L3_LR_SSH_Basic, SWOT Level-3 KaRIn Low Rate SSH Basic (v3.0) AVISO/DUACS https://doi.org/10.24400/527896/A01-2023.017

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Short summary
The Surface Water and Ocean Topography satellite gives high-resolution sea surface height data, yet converting these data into accurate ocean current maps is difficult. We compared three mapping products over the North Atlantic. The results show a scale-dependent trade-off: one product is best for large-scale currents, another captures finer details, and a third performs steadily overall. These insights help users in selecting the right product for their work.
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